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The magnetohydrodynamic turbulent cascade in the ecliptic solar wind: Study of Ulysses data

Sorriso-Valvo, Luca; Marino, Raffaele; Bruno, Roberto +3 more

The occurrence of a nonlinear turbulent energy cascade in solar wind plasma has been recently established through the observation of an exact law from spacecraft measurements. The main results obtained in the fast, polar wind measured by Ulysses spacecraft are reviewed here. In particular, the turbulent cascade is seen as the mean to provide the e…

Magnetic field modulated dust streams from Jupiter in interplanetary space

Flandes, Alberto; Krüger, Harald; Hamilton, Douglas P. +3 more

High speed dust streams emanating from near Jupiter were first discovered by the Ulysses spacecraft in 1992. Since then the phenomenon has been re-observed by Galileo in 1995, Cassini in 2000, and Ulysses in 2004. The dust grains are expected to be charged to a potential of ∼5 V, which is sufficient to allow the planet's magnetic field to accelera…

Scaling law of the reduced magnetic helicity in fast streams

Perri, S.; Balogh, A.; Bruno, R. +2 more

The reduced magnetic helicity is a quantity related to the handedness of the magnetic field fluctuations. In the present paper we study the scaling law of the reduced magnetic helicity in fast streams in the solar wind by using high-resolution magnetic field data by the Ulysses spacecraft. We show that at high frequencies both the left-hand and th…